Here is a list of all documented struct and union fields with links to the struct/union documentation for each field:

• adapterIndex : hpi_handle
• dwAttributes : hpi_format
• dwBitRate : hpi_format
• dwSampleRate : hpi_format
• dwState : hpi_async_event
• g : HPI_RDS_GROUP
• hObject : hpi_async_event
• objIndex : hpi_handle
• objType : hpi_handle
• readOnly : hpi_handle
• wChannels : hpi_format
• wEventType : hpi_async_event
• wFormat : hpi_format
• wIndex : hpi_async_event
• wModeLegacy : hpi_format
• wNodeIndex : hpi_async_event
• wNodeType : hpi_async_event
• wSequence : hpi_async_event
• wUnused : hpi_format